Unigas R91 VS Series, Руководство по установке, использованию и обслуживанию, Страница: 16 / 60

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Assembling the gas grain
To assemble the gas train, proceed as follows:
Fig. 2 - Example of gas train
To mount the gas train, proceed as follows:
1-a) in case of threaded joints: use proper seals according to the gas used;
1-b) in case of flanged joints: place a gasket (no. 1A..1E - Fig. 11) between the elements
NOTE: the bellow joint, the manual cock and the gaskets are not part of the standard supply.
ATTENTION: once the gas train is mounted according to the diagram on Fig. 11, the gas proving test mus be performed, according to
the procedure set by the laws in force.
The procedures of installation fo the gas valves are showed in the next paragraphs, according to the gas train used:

threaded gas trains with Siemens VGD20..

flanged gas trains with Siemens VGD40..
1A
5
1B
4 1C
2 1D
1E
3
Keys
1A..1E Gasket
2 Gas filter
3 Gas valves group
4 Bellow joint
5 Manual cock
”direction” arrows for installation